Hermit in the Torre Mondovi region. Carthusianlay-brother at the Charterhouse of Casularum, Lombardy, Italy where he managed the house’s external affairs. He was wholly un-learned in theology, philosophy or the ways of the world aside from his assigned duties, but in spiritual life and good works he was considered a saint in life.

One day when coming in from the fields, William was attacked by thieves, and defended himself by tearing the leg off his donkey and using it as a club to drive off the attackers; afterways he re-attached the leg, and the pair continued home.